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The Mary Baker Eddy Library

Discover an extraordinary life.
Explore an amazing world.

The Mary Baker Eddy Library provides public access and context to original materials and educational experiences about Mary Baker Eddy's life, ideas, and achievements.
Since 1935, more than 10 million people have traversed the thirty-foot glass bridge that spans the Mapparium, taking visitors to a unique spot: the middle of the world. This world-famous, three-story, stained-glass globe is one of the key attractions at the Library and illustrates how ideas have traversed time and geography and changed the world.